Paper file-handle.



K. A. 0. FRINDT.

PAPER FILE HANDLE.

APPLICATION FILED AUG. 21, 1912.

PatentedDec. 9, 1913.

COLUMBIA PLANOORAPH (IO-.WASIIINOTON, D. c.

"entrain s'rarns rgranr orrron.

KARL ALFRED QTT'O FRINDT, OF CHICAGO, ILLINOIS.

PAPER FILE-HANDLE.

To all whom it may concern:

Be it known that I, :KARL ALFRED O'r'ro FRINn'r, a subject of theEmperor of Germany, and a resident of Chicago, Cook county, State ofIllinois, have invented cer tain new and useful Improvements in PaperFileHandles; and I do hereby declare that the following description ofmy said invention, taken in connection with the accompanying sheet ofdrawings, forms a full, clear, and exact specification, which willenable others skilled in the art to which it appertains to make and usethe same.

This invention has general reference to improvements in paper filehandles, and it consists, essentially, in the novel and peculiarcombination of parts and details of construction, as hereinafter firstfully set forth and described and then pointed out in the claims.

In the drawings already referred to, which serve to illustrate my saidinvention more fully, Figure 1 is a diagrammatic outline of devicesemployed to perform the first operation in the production of myinvention. Fig. 2 illustrates the second operation partially completed.Fig. 3 is a cross section in line O O of Fig. 2. Fig. 4 is alongitudinal section of a completed file handle embody ing my invention,and Fig. 5 an elevation of the same.

Like parts are designated by corresponding characters or symbols ofreference in all the figures of the drawing. v

File handles as generally -manufactured have many defects, the greatestof which is their liability to split apart when the tang of the file isdriven into the handle. A cursory glance at the bench of the averagemachinist in the greater proportion of shops will disclose the fact thatthe majority of files in use are without handles, due almost entirely tothe fact that after a very short period of use, the handles of presentmanufacture have split apart and become useless.

The object of my invention is the production of a file handle which isunsplittable even under the most severe usage, and to attain thisresult, I manufacture my handle from a tough, thin strip of paper rolledupon itself in a large number of successive convolutions, a film of gluebeing employed to cement each successive wrap of paper to thatpreceding.

I will now disclose the art of producing my file handle and refer toFig. 1, in which Specification of Letters Patent.

Application filed August 21, 1912.

Patented Dec. 9, 1913.

Serial No. 716,146.

1 is a Work bench and 2 a roll of tough, thin paper supported bybrackets 3 underneath said bench, the width of which paper is theequality of the length of the handle being manufactured. From the roll3, the paper strip 4 is led upwardly through said bench and then over asmall leading roller 5, after which it passes over roller (3, the lowerportion of which roller is immersed in thin waterproof glue contained ina suitable glue pot 7. After being coated on one side with anapplication of glue from roller 6, the paper strip l passes over astripper blade 8, which slicks off all surplus glue, leaving only athin, even film thereon. Said strip is then led over rollers 9 and 10,the unglued face of the strip contacting with said rollers, whichrollers are held apart by helical springs 11, normally in compression,to create a certain amount of tension in the strip.

From roller 10, strip 4 leads to a rapidly revolving arbor or mandrel12, to which it is fed and permitted to wrap upon itself in successiveconvolutions until the largest diameter of the file handle is reached,when the strip is cut, and the now cylindrical blank 13 removed from themandrel and set aside to dry and cure. The arbor or mandrel 12 is squarein cross section for a part of its length and round for the remainder ofthe distance, thereby producing a core in said cylindrical blank 13,which has a core of square cross section at one end and of circularcross section at the opposite extremity.

After being tho-roughly cured and dried, the blank 13 is placed betweencenters 16 and 17 of an automatic gage lathe, square center 16 engagingthe square core 14-, being employed as a driver for the blank. Saidblank is then turned to proper external shape by a suitable turningtool, as seen in Fig. 2. In the process of turning, a shoulder 18 isformed at the end of the blank containing the square core, for thereception of a metallic ferrule 19. Said shoulder is considerablyshorter than the said ferrule, so that when the latter is forced oversaid shoulder, the free end of the ferrule is forced into the fibrousbody of the handle, which is now designated as A, thereby insuring afirmer contact of the ferrule with the shoulder and the body.

Vvhen the handle is being turned up, an axial boss 20, Fig. 2, is formedat the rear end of the handle, which boss is finally hammered flush withthe surrounding surface, to close opening 15 by upsetting the fiber, asseen at 21, Fig. l. The final operation completing the handle, is theapplication of a coat of varnish to the exterior thereof.

It will now be observed that I produce a handle which is practicallyunsplittable. The square core at the front end of the handle is the*most serviceable for the receptionof the tangof a file, and, byforcing; the ferrule 19 directly into the fibrous body; the same is sotightly held in place as to:

eliminate any possibility of its becoming loose and falling off, as isthe case in file;

paper file handle comprising a blank comha-ndles as now made.

In the =foregoi ng I have disclosed the art of manufacturing fi'lehaindles, but I do not confine myself to file handles only. Any handle0f circular cross section and of any size may be produced withoutdeparting from the spirit or scope of my invention.

Attention is directed to the fact *that this handle forms an extremelydurable handle for carpenters tang or socket firmer chisels. In actualpractice I have found that the handles cannot be split by blows appliedto the striking face or end of the handle, and I have also found thatpractically the entire force of a :blow is itransmi tted to the chiselpoint, because of the non-resiliency and :intense density of thestructure.

I- Ia Ving thus fully described my invention, I claim as new and desireto secure to myself by Letters Patent of the United -States: I

1. The art 0f mak-ing paper file handles which consists in Wrapping astrip of glue coated paper upon a rapidly revotvin mandrel which ispartially angular and par tially round in cross section, *to produce aand a square core at the other extremity,

then turning the exterior of said blank to shape, and finally closingthe end of said round core by upsetting the fiber there about.

3. As a new article of manufacture, a

posedof a single strip of :glue coated paper wrapped upon itself in aplurality of sucthroughout said blank, one :end of which core is ofangular cross section and the other of round cross section.

4. As a new article of maiuifacture, a paper file handle comprising ablank composed of a single strip of glue coated paper Wrapped uponitself in a plurality successive convolut-ions and turned to properexterior shape, there being an axial core throughout said blank, one endof wh-iohcore is of square cross section, merging into a round crosssection at t-he other end, the outer extremity of said round portion ofthe core being closed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

KARL ALF-RED GT' l O FRIN'DT.

In the presence of WV. HARDING, IVILLTAM O. STAR-K.

Cdpiesefth'i's patent may be dlitainefl for "fivecents each, byaddressing the Commissioner of Patents, Was'lii'ligtOn, D.'C.

